arm64: defconfig: Enable dwmac-sun8i driver on defconfig

Enable the dwmac-sun8i ethernet driver as a module in the ARM64 defconfig.
Signed-off-by: NCorentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/arm64/configs/defconfig

@@ -190,6 +190,7 @@ CONFIG_RAVB=y
 CONFIG_SMC91X=y
 CONFIG_SMSC911X=y
 CONFIG_STMMAC_ETH=m
+CONFIG_DWMAC_SUN8I=m
 CONFIG_MDIO_BUS_MUX_MMIOREG=y
 CONFIG_MESON_GXL_PHY=m
 CONFIG_MICREL_PHY=y